+#include "command_db.h" /* for get_command_id() */
+
+
+
+/* Log monster (described by "dsc_monster1") bumping into "monster2". */
+static void monster_bumps_monster(struct World * world, char * dsc_monster1,
+ struct Monster * monster2);
+
+/* Decrement player HPs due to attack of monster described by "dsc_monster",
+ * kill player if his HP hit zero; log the whole action.
+ */
+static void monster_hits_player(struct World * world, char * dsc_monster);
+
+/* Decrement HP of "monster" hit by player, kill it if its HP hit zero, create a
+ * corpse and increment player's score by the amount of hitpoints the monster
+ * started with; log the whole action.
+ */
+static void player_hits_monster(struct World * world, struct Monster * monster);
+
+/* Try moving the player in direction "d" towards coordinate "target"; log
+ * success or failure of the whole action.
+ */
+static void try_player_move(struct World * world,
+ enum dir d, struct yx_uint16 target);
+
+
+
+static void monster_bumps_monster(struct World * world, char * dsc_monster1,
+ struct Monster * monster2)
+{
+ char * bump_dsc = " bumps into ";
+ struct MapObjDef * mod = get_map_obj_def(world, monster2->map_obj.type);
+ char * msg = malloc(strlen(dsc_monster1) + strlen(bump_dsc)
+ + strlen(mod->desc) + 3);
+ sprintf(msg, "\n%s%s%s.", dsc_monster1, bump_dsc, mod->desc);
+ update_log(world, msg);
+ free(msg);
+}
+
+
+
+static void monster_hits_player(struct World * world, char * dsc_monster)
+{
+ char * hit_dsc = " hits you";
+ char * msg = malloc(strlen(dsc_monster) + strlen(hit_dsc) + 3);
+ sprintf(msg, "\n%s%s.", dsc_monster, hit_dsc);
+ update_log(world, msg);
+ free(msg);
+ world->player->hitpoints--;
+ if (0 == world->player->hitpoints)
+ {
+ update_log(world, "\nYou are dead.");
+ }
+}
+
+
+
+static void player_hits_monster(struct World * world, struct Monster * monster)
+{
+ struct MapObjDef * mod = get_map_obj_def(world, monster->map_obj.type);
+ char * hit_dsc = "You hit the ";
+ char * monster_dsc = mod->desc;
+ char * msg = malloc(strlen(hit_dsc) + strlen(monster_dsc) + 3);
+ sprintf(msg, "\n%s%s.", hit_dsc, monster_dsc);
+ update_log(world, msg);
+ free(msg);
+ monster->hitpoints--;
+ if (0 == monster->hitpoints)
+ {
+ hit_dsc = "You kill the ";
+ msg = malloc(strlen(hit_dsc) + strlen(monster_dsc) + 3);
+ sprintf(msg, "\n%s%s.", hit_dsc, monster_dsc);
+ update_log(world, msg);
+ free(msg);
+ struct MonsterDef * md = (struct MonsterDef * ) mod;
+ struct Item * corpse = malloc(sizeof(struct Item));
+ corpse->map_obj.type = md->corpse_id;
+ corpse->map_obj.pos = monster->map_obj.pos;
+ corpse->map_obj.next = world->item;
+ world->item = corpse;
+ if (world->monster == monster)
+ {
+ world->monster = world->monster->map_obj.next;
+ }
+ else
+ {
+ struct Monster * m_prev;
+ for (m_prev = world->monster;
+ m_prev->map_obj.next != monster;
+ m_prev = m_prev->map_obj.next);
+ {
+ m_prev->map_obj.next = monster->map_obj.next;
+ }
+ }
+ uint8_t score = md->hitpoints_start;
+ world->score = world->score + score;
+ free(monster);
+ }
+}
+
+
+
+static void try_player_move(struct World * world,
+ enum dir d, struct yx_uint16 target)
+{
+ char * dsc_dir;
+ if (NORTH == d)
+ {
+ dsc_dir = "north";
+ }
+ else if (EAST == d)
+ {
+ dsc_dir = "east" ;
+ }
+ else if (SOUTH == d)
+ {
+ dsc_dir = "south";
+ }
+ else if (WEST == d)
+ {
+ dsc_dir = "west" ;
+ }
+ char * dsc_move = "You fail to move ";
+ if (is_passable(world->map, target))
+ {
+ dsc_move = "You move ";
+ world->player->pos = target;
+ }
+ char * msg = malloc(strlen(dsc_move) + strlen (dsc_dir) + 3);
+ sprintf(msg, "\n%s%s.", dsc_move, dsc_dir);
+ update_log(world, msg);
+ free(msg);
+}